Do We Have a Framework for Defining Labor Antitrust Markets?

We work with clients in all phases of litigation, regulatory inquiries and arbitrations. Our European team, together with our global firm resources, are committed to providing consistently high-quality analyses and expert testimony.

We are privileged to work on a wide range of our clients’ most high-profile matters. Our approach uses the experience of our staff to support world-class academic, industry and in-house experts.

Featured Experts

Featured Experts

John Asker

Armen A. Alchian Chair in Economic Theory and Professor of Economics,
University of California, Los Angeles;
Senior Advisor, Cornerstone Research

John Asker is a leading expert in industrial organization and antitrust and competition economics. Professor Asker focuses on topics related to antitrust policy, cartel behavior, vertical restraints, auction design, firm-level productivity, industry subsidy effects, artificial intelligence (AI) pricing mechanisms, and cryptocurrency. He also has experience with issues at the intersection of financial markets and antitrust.

Professor Asker has testified in numerous high-profile matters, including mergers and civil litigation.

Professor Asker was retained by Amazon in its $8.5 billion acquisition of Metro-Goldwyn-Mayer, which Global Competition Review named as 2023 Matter of the Year. Counsel for Meta retained him to assess competitive effects in the U.S. Federal Trade Commission’s (FTC’s) review of Meta’s $1 billion acquisition of Kustomer. He was retained by counsel for SoftBank and Sprint Corporation in the $26 billion T-Mobile/Sprint merger. Professor Asker provided written testimony to the World Trade Organization on behalf of the Canadian government in the U.S.–Canada softwood lumber dispute.

Professor Asker has served as an economic consultant to both federal and state regulatory agencies. In the AT&T/DirecTV merger, he served as an expert for the U.S. Federal Communications Commission. The U.S. Department of Justice retained him to evaluate potential competitive effects of the then-proposed merger between Dow Chemical Co. and DuPont. He has coauthored several amicus briefs presented before the U.S. Supreme Court and federal appellate courts.

Professor Asker has provided testimony, in depositions and at trial, in multiple civil litigation matters. In EFN West Palm Motor Sales LLC v. Hyundai Motor America Corp. et al., a federal trial, his testimony on vertical relations between a manufacturer and dealers contributed to the jury ruling in favor of Hyundai and awarding no damages. Professor Asker has also testified in cases alleging exclusionary conduct, cartel behavior, price discrimination, and predatory trading. He has been retained in antitrust matters involving financial markets to address issues of alleged collusion and price manipulation.

Professor Asker has conducted extensive research on cartels, including their structure and operation, aggregate market power impact, related economic damages, and implications for antitrust policy. He has contributed research on cartels and collusion to leading economics reference texts, notably the Handbook of Industrial Organization. He has also published in leading journals on vertical restraints.

Professor Asker is an editor of the Journal of Political Economy. He has also held editorial positions at the American Economic Journal: Microeconomics, the RAND Journal of Economics, and the Journal of Industrial Economics. His research has been published in leading economics journals, including the Journal of Political Economy and the American Economic Review.

Lexology Index (formerly Who’s Who Legal) has recommended Professor Asker as a leading competition economist and consulting expert in the competition field. Global Competition Review recognized him to its inaugural list of the world’s most important antitrust academics. The Australian government appointed Professor Asker to a Competition Taskforce Advisory Panel that oversees changes to Australia’s competition laws.

Professor Asker teaches courses in antitrust policy, industrial organization, and strategy. He also speaks on antitrust topics, including to U.S. federal agencies, and has been a visiting scholar at the FTC’s Bureau of Economics, the Department of Economics at Harvard, and Yale Law School. Before joining the UCLA faculty, Professor Asker was an associate professor of economics at the Stern School of Business at New York University.

Featured Experts

Andrea L. Eisfeldt

Laurence D. and Lori W. Fink Endowed Chair in Finance,
Professor of Finance,
UCLA Anderson School of Management,
University of California, Los Angeles

Andrea Eisfeldt is an expert on financial markets. Professor Eisfeldt’s current research includes financial economic issues related to market liquidity, traditional and intangible asset valuation, the impact of generative artificial intelligence (AI) on firm values, bank products and valuation, over-the-counter (OTC) markets, and equity-based compensation.

Professor Eisfeldt has been retained as an expert witness in numerous finance matters, analyzing a range of issues that include valuation, financial institutions, investment, and fixed income and derivatives, as well as FinTech and crypto assets. In securities class actions, she has addressed class certification, loss causation, and damages issues. Professor Eisfeldt has testified in depositions, arbitrations, and trials.

Professor Eisfeldt holds editorial roles at leading academic journals and has published articles in the Journal of Finance, the Review of Financial Studies, the Journal of Financial Economics, the Journal of Monetary Economics, Real Estate Economics, and Econometrica, among other highly regarded research outlets. Her work has been awarded best paper prizes by the Journal of Finance, the Journal of Financial Economics, and Real Estate Economics.

At the National Bureau of Economic Research (NBER), Professor Eisfeldt is a research associate in the programs for asset pricing, corporate finance, and economic fluctuations and growth.

Professor Eisfeldt is a member of the board of directors of the UCLA Investment Company, which manages part of the University’s endowment. She has also served on the board of the American Finance Association as a member of the investments, ethics, and strategic planning committees. She also serves as an academic advisor to Vise, a FinTech investment management firm. Professor Eisfeldt’s research on valuing intangible assets led to the creation of the Next Intangible Indices used in the Simplify NXTI ETF.

In addition to her more than two decades in finance research and teaching, Professor Eisfeldt has extensive asset management experience, including as chief economist at Structured Portfolio Management and as a consultant to AQR Capital Management.

At UCLA Anderson, Professor Eisfeldt teaches courses on bonds, options and currencies, corporate finance, FinTech, and cryptocurrency. Previously, she spent a decade at the Kellogg School of Management at Northwestern University, receiving tenure in 2007.

Featured Experts

Gregor Langus

Vice President*

Gregor Langus leads Cornerstone Research’s Brussels competition team. Dr. Langus is a leading European competition economist who supports clients and provides expert testimony in antitrust investigations, merger reviews, competition damages matters, and arbitration proceedings.

Dr. Langus has worked on matters in multiple jurisdictions, including before the European Commission (EC) and competition authorities and courts of several European Union member states.

Dr. Langus served in the Chief Economist’s Team in the EC’s Directorate-General for Competition (DG COMP) for over seven years, in two separate appointments. During that time, he worked on numerous complex merger reviews, including IBM/RedHat, Dow/Dupont, Blackstone/Celanese, Broadcom/Brocade, Microsoft/LinkedIn, ASL/Arianespace, Wabtec/Faiveley, Siemens/DresserRand, Intel/McAfee, Oracle/Sun, EDF/British Energy, Campina/Friesland, and TomTom/TeleAtlas. Dr. Langus also consulted on matters alleging abuse of market power and information exchange.

Dr. Langus is the lead author of several competition policy studies focused on copyright, licensing, merger control, and telecommunications issues. His academic articles have been published in peer-reviewed journals, including the International Journal of Industrial Organization, Economics Letters, the Journal of Competition Law and Economics, and Concurrences.

Dr. Langus has extensive consulting experience as head of CompetitionSphere, and in senior roles with major economics consulting firms. Dr. Langus also has teaching experience as a lecturer at Tilburg University.

Dr. Langus speaks widely on competition, mergers, and SEP issues. Lexology Index (formerly Who’s Who Legal) has recognized him as a Thought Leader and recommended him as a leading competition economist and consulting expert in the competition field.

*GLECON SRL

Featured Experts

Liam Colley

Senior Vice President

Liam Colley heads Cornerstone Research’s European competition practice. Mr. Colley is a testifying economics expert specializing in competition, antitrust damages, and economic regulation issues. He has more than twenty-five years of experience as a consultant and testifying expert. His experience includes multiple high-profile matters before U.K. and European Union courts and competition regulators. Citing the “unassailable quality of his work,” Lexology Index (Who’s Who Legal) has named Mr. Colley a leading competition economist, as well as a Thought Leader and Global Leader in the competition field.

Antitrust and competition

Mr. Colley has consulted on a range of competition matters before the European Commission, national competition authorities, regulators, and courts. His expertise includes matters arising in automotive; financial services; insurance; technology, media, and telecom (TMT); and transportation. He has supported clients on numerous antitrust investigations and market inquiries. In addition, Mr. Colley has worked on multiple mergers, particularly on matters involving efficiencies and failing firm defenses.

Antitrust damages

Mr. Colley has wide experience estimating damages that arise from breaches of competition rules. In cartel damages matters, he has prepared numerous expert reports in the context of high court litigation, arbitration, mediation, and settlement negotiations. He has addressed class action issues and worked on many stand-alone and follow-on actions in abuse of dominance cases.

Mr. Colley has served as a testifying expert before the U.K. High Court and the U.K. Competition Appeal Tribunal (CAT) on both antitrust damages matters and regulatory appeals.

Mr. Colley publishes and speaks widely on competition and damages issues. Before joining Cornerstone Research, for many years he led the global economics practice of a major professional consulting firm.

Featured Cases and Publications

The 5th Annual UK Class Actions Forum 15 October 2025

The 5th Annual UK Class Actions Forum

Liam Colley of Cornerstone Research will discuss defence strategies for collective action cases at this conference hosted by Thought Leaders 4 Disp...

CompLaw: Merger Control 2025 7 October 2025

CompLaw: Merger Control 2025

Andrew Swan of Cornerstone Research will discuss AI partnerships and merger control at this conference hosted by Informa Connect.

GCR Live: Competition Litigation 2025 7 October 2025

GCR Live: Competition Litigation 2025

Anca Cojoc of Cornerstone Research will discuss the growing scale of antitrust litigation at this annual conference in London.

Global Antitrust Hot Topics: EU, US & Global Perspectives 25 September 2025

Global Antitrust Hot Topics: EU, US & Global Perspectives

Gregor Langus of Cornerstone Research will discuss high-profile issues in antitrust at this conference in Brussels.

The UK Digital Markets Competition Regulation Forum 2025 23 September 2025

The UK Digital Markets Competition Regulation Forum 2025

Elisa Mariscal of Cornerstone Research will discuss the UK DMCC and developments in technology merger control at this conference in London.

Do We Have a Framework for Defining Labor Antitrust Markets? 18 September 2025

Do We Have a Framework for Defining Labor Antitrust Markets?

A guide to defining labor antitrust markets in the US, UK, and EU, with case studies on how authorities use evidence in their analysis.

Self-Preferencing in Retail Digital Marketplaces: Evidence from Transaction Data 18 September 2025

Self-Preferencing in Retail Digital Marketplaces: Evidence from Transaction Data

The authors analyze retail transaction data to explore self-preferencing practices.

Lexology Index 2025: Competition–Economists 7 August 2025

Lexology Index 2025: Competition–Economists

A record 31 individuals—13 academic experts and 18 consulting professionals—are recommended for their outstanding antitrust and competition work.

Lexology Index: Energy Experts 2025 1 July 2025

Lexology Index: Energy Experts 2025

Greg Leonard of Cornerstone Research recognised as a leading consultant in the energy sector.

Workshop on Economics of Competition and Regulation 17 June 2025

Workshop on Economics of Competition and Regulation

Matthias Lux of Cornerstone Research will discuss algorithmic collusion during a two-day event at City St George’s, University of London.

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